Employee Stock Benefit Plans (Schedule Of Stock-Based Compensation Expense, Net Of Tax, Related To Employee Stock-Based Compensation (For All Plans)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 43,398	$ 36,442	$ 32,660
Cost Of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	3,184	2,573	2,005
Research And Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	6,825	5,039	5,319
Sales And Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	7,613	7,329	7,017
General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	25,776	21,501	18,319
Total Operating Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 40,214	$ 33,869	$ 30,655